The structure of the musculoskeletalsystem includes two systems in the body. Together, these systems help providesupport, ability, and movement for the body. The growth or formation of thebone structure is known as ossification.

Cartilage is flexible and stretcheslike rubber bands. The human skeleton is fitted together by joints. Themusculoskeletal system can also be affected or damaged due to old age,genetics, or fetal development. These result in musculoskeletal disorders.These disorders range from arthritis, to osteoporosis, and Paget’s disease.ConclusionWeall know at least one person with a joint disorder.

Arthritis is a commondisorder within the musculoskeletal system pertaining to joints. Arthritis isinflammation in any single or multiple joints and worsens with age. Osteoarthritisoccurs when flex tissue at ends of the bone wear down. Another common jointdisorder that worsens with age.

Polymyalgia rheumatica, another muscle jointdisorder, causes muscle pain and stiffness around the hip and shoulders. Mostjoint disorders are inflammatory disorders. Cartilageis a touch connective tissue, but cartilage disorders are possible. Somedisorders are chondrocalcinosis and chondromalacia. Chondrocalcinosis is aninteresting disorder.

A condition which calcium crystals cause pain in thejoints. It includes swelling and stiffness most commonly in the knee. Once thecartilage is damage it is tough to heal. Chondromalacia is damage to thecartilage under the kneecap. Common reference to chondromalacia is “runners’knee”. This disorder is caused by overuse in sports or improper knee alignmentand is common in young athletes. Bonedisorders can damage the skeleton and cause bones to weaken and be prone toinjuries or fractures. For older men and women, the common disease is Paget’sdisease which causes skeletal deformation and fractures.

If a child was likelyto have a bone disorder, it would probably be Osteogenesis Imperfecta.Osteogenesis is inherited and causes frequent fractures in children because thebones are so brittle. Other common disorders in the bone structure areosteoporosis, rickets, and hip dysplasia. Disorders: Bone, Cartilage, and JointJoint function connects the bones within the body. Itenables you to bear weight and be mobile. The jointsfunction consists of the muscle, cartilage, ligaments, and fluids all workingtogether. Each joint provides different functions.

The ball and socket jointsare found in the hip and shoulders, and hinge joints are your elbows and knees.All joints provide a unique skill to maintain stability and mobility. Forconditions such as arthritis, and osteoarthritis, understanding the joints andits functions can really help. The simple function of our joints are to connectone bone to another and allow us to move in different directions. The main function of the cartilage isto provide flexible support and serves as a sliding area to the joints.

Thecartilage connects bones together and provides a home when bones are firstdeveloped. Cartilage is essential for the growth and development of long bones.EarlierI discuss the three different types of cartilages, the hyaline, fibrocartilage,and elastic cartilage. In this section I will discuss their functions. Startingwith the hyaline cartilage, its function provides smooth surfaces and enablestissues to slide easily over one another, as well as providing flexibility andsupport. The fibrocartilage simply provides support and rigidity to surroundingstructures and is the strongest cartilage of the three. The elastic cartilagealso provides support to attached structures, as well as defining andmaintaining the shape of the present area. Thefunction of the bone protects and supports the body.

Bones is to body as nucleus is tocell. The bone constantly shapes and moves to align with the forces place uponit daily. Another function is that it stores up minerals, nutrients, andlipids. Bones also produces blood cells that nourish our body, protects us frominfection, and provide a framework for the attached muscles and tissues. Bonesprotects all internal organs from injury, enables body movement, and storesenergy.Function: Bone, Cartilage, and JointUpnext, we have the joints.

Joints are anywhere in the body where two bones meet.Muscle joints are very flexible and important because they are necessary formovement. There are three types of joints in the body and all are active “orsupposed to” when performing activities. You have your synovial joint “aka”diarthrodial joint, which has no tissue between the articular surfaces.Synovial joints are freely moveable, and majority of the body make up this joint.The fibrous joint, which is immoveable, has fibrous tissue bridges betweenbones.

The cartilaginous joints are slightly moveable and has a cartilagebridge between bones. Thestructure of cartilage tissue consists of a dense matrix of collagen andelastic fibers in a rubbery substance. Chondroblasts are the name of the cellsthat produce the matrix, and chondrocytes cells are the mature cartilage. Thechondrocytes can occur in lacunae, either alone or in multiple within spaces.

Most cartilage surfaces are surrounded by perichondrium. Perichondrium is amembrane of dense irregular tissue. Only in perichondrium cartilage containsblood vessels or nerves. There are three types of cartilage, each withdifferent structures are hyaline, fibrocartilage, and elastic cartilage.

Adulthumans have two-hundred and six bones while newborn babies have three-hundred,but fusion occurs as the child develops. The longest bone in the body is femurand the smallest bone in the body is stapes. There are two bone groups thatmake up all the bones in the adult human body: axial and appendicular skeleton.The axial consists of eighty bones. Twenty-nine bones in the skull, twenty-fivebones in the thorax, and thirty-three bones in the vertebrae. The appendicularskeleton is the larger one out the two, covering one-hundred and twenty-sixbones.

The pectoral girdle holds four bones, upper extremity sixty bones, lowerextremity sixty bones, and the pelvic girdle holding just two bones. Structure: Bone, Cartilage, and Joint         Forevery basketball you shoot, trick you land with a skateboard, or simply goswimming with friends, you are using muscles, joints, and bones. Without thesebody parts, you probably would not make it out of bed. Ninety-nine percent ofthe body’s calcium is in the bone and eighty percent of bone tissue by weightis minerals.

The human musculoskeletal system is comprised of two systems inthe body: muscular and skeletal. These systems consist of bones of the skeleton, muscles, cartilage, tendons, ligaments, joints,and other connectivetissue that supports andbinds tissues and organs together. The bones provide supportfor the body, which shapes our human skeleton. Joints connect different bonestogether to allow motion within the body. Flexible connective tissue known ascartilage prevents friction between the bones. Musculoskeletal system disordersaffect the bones, joints, and cartilage.

Usually these disorders are common, asyou get older. Performing daily or physical activities may cause yourmusculoskeletal system to wear down over time. Introduction


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